Please contact Shanghai Boqu Instrument Co., Ltd. Customer service for the FOB of cod analyser . We suggest customers place the order under this freight term. FOB means better logistics solution. Our local forwarding company will quote the best price and provide more than one solution. The response time to any delivery issues will be shorter. And FOB means better control and work efficiently. Customers can have better control of their budget. The cost is always important and they will have a better chance of gaining a more competitive freight rate.

As a professional dissolved oxygen meter producer, Boqu Instrument is greatly recognized among customers. Boqu Instrument has created a number of successful series, and dissolved oxygen sensor is one of them. Besides sodium analyser, sodium analyzer is also very popular for its sodium analyser. It promotes a high chemical reaction speed. Referring to dissolved oxygen meter, high quality is the most suitable word for it. Its accuracy and high precision contribute to its low detection limit.

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The constant potential of the online residual chlorine detector is an industrial online water quality analysis monitoring and control instrument. It is used for waste water and water treatment in waterworks, drinking water distribution network, swimming pool, hospital, etc. It is matched with chlorine dioxide generator equipment, continuous measurement or automatic dosing control can be implemented. Simply put, the residual chlorine detector is an instrument for rapid detection of residual chlorine. The instrument is equivalent to a small spectrophotometer. After the water sample is reacted with a special reagent, the residual chlorine/total chlorine value is calculated by the spectrophotometric method. . The use process of the residual chlorine detector: 1. The factory setting range of the water quality analyzer is generally 2PPM. If you need to change it, please go to the CAL calibration menu to set it; 2. Before the first power on, you must first replace the diaphragm and electrolyte, and the electrolyte into the electrolyte cavity, and pour to the lower edge of the internal thread. 3. The inner diameter of the plug joint interface of the water inlet of the steady flow box is ¼"I.D., the outlet plug connector interface is ½ inner diameter"I.D. 4. If a new probe is installed, it needs to be stabilized for several hours to avoid too much error and inaccurate measurement. If the zero point or range needs to be calibrated, the probe must be soaked in pure water for 8 hours or used for 24 hours before the zero point or range can be calibrated. 5. The probe is based on the detection principle of a platinum electrode. Generally, the diaphragm and electrolyte need to be replaced every three to six months in tap water. If it is not replaced for a long time, a large amount of iron, manganese and other metals in the water will be deposited on the electrode, which will cause inaccurate measurement of the electrode. If there is not much electrolyte, the electrode will also be burned. 6. When the probe is cut off from the water, the power must be cut off. If the power is not cut off, the electrodes will easily burn out. Residual chlorine means that after the water has been chlorinated and disinfected, after a certain period of contact, it will consume part of the chlorine in addition to the action of bacteria, microorganisms, organic matter, and inorganic matter in the water. The remaining part of the chlorine is called residual chlorine. Several factors that affect the measurement of the online residual chlorine analyzer: 1. The pH value of the sample water The pH value of the sample water has a great influence on the measurement of residual chlorine, especially when the pH value is 10. 2. Temperature of sample water The temperature of sample water has a certain influence on the measurement of residual chlorine. It is generally believed that the measured value will increase by about 5 for every 1°C increase in temperature. The ideal water sample temperature should be between 15-20°C. 3. Ammonium chlorine concentration in sample water In practical application, it is sometimes found that the amount of chlorine added increases, but the residual chlorine in the sample water decreases, and when it increases again, the residual chlorine increases again. This is what we often call breakpoint chlorine addition. Usually this is caused by the high concentration of ammonia nitrogen in the water, and the chemical reaction between chlorine gas and ammonia nitrogen in the water to produce chlorine ammonia. 4. Pressure and flow rate Excessive pressure and too fast flow rate will cause the electrode to respond too late and reduce the measured value. If the pressure is too small and the flow rate is too slow, the hypochlorous acid in the sample water will not be replenished in time and the sensitivity will be reduced.
For the study, researchers defined BOQU as strategies to foster some social good, including programs that benefit community engagement, diversity, the environment, human rights and employee relations.
To build customers value by delivering high-quality products, services and solutions in innovative and cost effective ways. Shanghai Boqu Instrument Co., Ltd. will realize this mission by setting the highest standards in service, reliability, safety and cost containment in our industry.
Producing with varied technical skills, water analyzer can be used in a wide range of applications as water quality monitoring device.
With a complete manufacturing plant, Shanghai Boqu Instrument Co., Ltd. is able to meet the most stringent specifications, no matter the type of product. A dedicated team of experts handle these value-added services, ensuring that customer needs are met on time, consistently monitoring quality and performance of water analyzer to the highest international standards. Visit BOQU Water Quality Analyzer to learn more.

If you are utilizing an online turbidity meter in your water treatment process or monitoring system, you would know that this device is prone to face several issues that need troubleshooting. The most common problems that could arise include poor readings, fouled sensors, malfunctioning signal cables, and drifts. In this article, we will discuss some of the effective measures you can take to handle these issues.

1. Troubleshoot Reading Errors

An online turbidity meter typically displays the readings on a screen or sends it through some output signal to other devices. If you get obscure readings or no readings at all, you need to examine the cause of the errors and take the necessary corrective measures.

First, you should check if the device is power supplied and the cables or connections are not faulty. It would be best if you also checked if the zero set point calibration is functioning correctly. If none of these works, ensure your meter is close enough to the water source and you are using the correct range of the device. If it still fails to function, consider replacing the sensors.

2. Sensor Fouling

The online turbidity meter sensor may get dirty from time to time due to the accumulation of dirt, dust, and algae. The fouling of sensors may significantly increase drift and lead to incorrect readings.

One way of dealing with sensor fouling is by setting up a self-cleaning function that uses high-pressure water jets to get rid of any dirt or algae build-up. It would help if you also rinsed the sensors regularly with clean water to avoid fouling. If this method fails, you may want to consider replacing the sensor.

3. Signal Cable Problems

Weak or poor signal cables could lead to incorrect or misleading results being sent to your data logger or other remote devices. These issues could result from faulty or damaged cables, and they need to be addressed promptly.

To resolve this issue, first, check if the cables are connected correctly. Ensure that they are tight and fit snugly on the terminal connections. Additionally, look out for any breaks or cuts in the signal cables and replace them where necessary.

4. Calibration Drifts

Calibration drift is a common issue with online turbidity meters. Drifts occur when your calibration setup is not correct, or your instrument is not adequately aligned.

To resolve this issue, you should conduct regular calibration checks to confirm the set-point is correct. Ensure the meter is well-positioned and the sensors correctly aligned. If you detect drifts, you can adjust the calibration to remain accurate. However, if you continue to experience these issues over time, you may need to consider replacing your turbidity meter with a newer model.

5. Lowering Sensitivity

A lousy calibration reading could be caused by high sensitivity. You may want to lower the sensitivity to avoid getting hyperactive readings or poor results.

To do this, check the device manual and follow the manufacturer's instructions to adjust the sensitivity level correctly. Do this gradually until you get the desired readings. Once you have arrived at the right sensitivity, carry out another calibration check to confirm the accuracy of your device.

In summary, an online turbidity meter is an essential device in any water treatment process, and it is essential to ensure it's functioning correctly. By implementing the steps discussed above, you can troubleshoot most of the common issues that may arise. However, if you find yourself struggling with the instrumentation and maintenance, consult a professional for further assistance.